Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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The present invention relates to a system for
fixedly molting a case or the like box-shaped article
and more particularly to a system for fixedly mounting
a case or the like box-shaped article for housing
therein an electric appliance such as receiver or
-the like to the body of a vehicle such as a motorcar.
The present invention will he further illustrated
by way of the accompanying drawings in which:
Fig. 1 is a perspective view of a conventional
system for immovably mounting a case on a mounting
base, shown in the disassembled state.
Fig. 2 is a perspective view of another
conventional system for immovably mounting a case Oil a
mounting base, shown in the disassembled state.
Ego. 3 is a perspective view of a system for
immovably mounting a case on a mounting base in accord-
ante with the first embodiment of the invention,
shown ill the disassembled state.
Fig. 4 is an enlarged fragmental vertical
sectional view of the system in Fig. 3, particularly
illustrating how a fastening bolt of which head serves
as a projection is thread ably secured to the case.
Fig. 5 is a view of the fastening bolt as seen
from the below in Fig. 4.
Fig. 6 is an enlarged fragmental plan view of
the mounting base, particularly illustrating how the
holes through which the projections are inserted are
designed.
Fig. 7 is an enlarged fragmental side view of
the system, particularly illustrating how the projection
on the fastening bolt is engaged to the periphery of
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the hole on the mounting base.
Fly. is an enlarged perspective view of a
displacing device for the system in Fig. 1.
Fig. 9 is a perspective view of a system for
immovably mounting a case on a mounting base in
accordance with the second embodiment of the invention,
shown in the disassembled state, and
Fig. 10 is an enlarged perspective view of a
displacing device for the system in Fig. 9.
To fixedly mount a case for housing an electric
lo appliance such as receiver or the like to the body of
a motorcar there are hitherto made a variety of proposals.
To facilitate understanding of the present invention,
it will be helpful that typical conventional systems
for fixedly mounting a case or the like box-shaped
article are briefly described below with reference to
Figs. 1 and 2 each of which is a perspective view of a
mounting base and a case employed for carrying out
the conventional system, shown in a disassembled state.
In the conventional system as illustrated in
Fig. 1, a case 2 to be fixedly mounted is adapted
to be slid ably fitted onto mounting base 1 usable
for fixedly mounting on motor car (hereinafter referred to
- lo -
so
simply as mounting base). In the illustrated case
the mounting base is formed by bending both the end
parts of a plate.
Specifically, the case 2 is inserted into the
mounting base 1 to reach a predetermined position
located in the latter while the bottom of the case 2
is slid ably displaced along guide rails lo and lb on
both the ends of the mounting base 1 in the direction
as identified by an arrow mark A. it this moment a
tongue (not shown) on a fastener 3 disposed on each
of the side walls of the mounting base 1 is fitted
into a groove pa on each of thy side walls of the
case 2. As a screw 3 on the fastener 3 is tightened,
the tongue is moves upwardly into a recess pa' on
the guide groove pa and it is then brought in abutment
against the end face of the recess pa' whereby the
case 2 is fixedly mounted on the mounting base l.
On the other hand, in the conventional system
as illustrated in Fig. 2 a mounting base 10 usable for
fixedly mounting on motorcar (hereinafter referred to
simply as mounting base) includes a plurality of
tongues 11 and 12 with cutouts ha and aye formed on
both the side walls thereof and pins 14 and 15
projecting outwardly of the side walls of a case 12
are inserted into the cutouts ha and aye. Thereafter,
a set screw 16 is tightened whereby the case 13 is
fixedly mounted on the mounting base 10.
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It should be noted that the mounting bases 1
and 10 are fixedly secured to the body of a motorcar
at the predetermined position by tightening set
screws (not shown) screwed through threaded holes lb
and 10b on the upper surface lo and the lower surface
aye thereof.
In case of the conventional system as illustrated
in Fig. 1 there is necessity for sparing the space
of which length is determined longer than the dimension
as measured in the direction of sliding movement of the
case 2 so as to allow the latter to be fitted into the
mounting base 1, because the case 2 is fixedly mounted
on the mounting base 1 by inserting the former into
the latter. Another drawback of the conventional
system is that the case 2 tends to be displaced in
the vertical direction in the form of vibration during
movement of a motorcar, because firm mounting of the
Cassius achieved merely by abutment of the tongue
against the upper end face of the recess pa'.
On the other hand, in case of the conventional
system as illustrated in Fig. 2 displacing of the case
13 in the vertical direction as well as in the long-
tudinal direction is inhibited because the case 13 is
fixedly mounted on the mounting base 10 by way of the
steps of inserting the pins 14 and 15 into the cutouts
ha and aye and then thrusting the former against the
bottom of the latter by tightening the set screw 16.
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However, the case 13 tends to move idly in the transverse direct
lion (as identified by arrow marks B in Fig. 2) due to dime-
signal tolerance specified for both the mounting base 10 and the
case 12.
s
Thus, the present invention provides an improved system
for fixedly mounting a case or the like box-shpaed article which
is entirely free from the drawbacks of the conventional systems
as mentioned above.
The invention also provides an improved system for
fixedly mounting a case or the like box-shaped article which
requires the minimized space for the purpose of firm mounting.
The invention again provides an improved system for
fixedly mounting a case or the like box-shaped article which
assures no occurrence of idle displacing of the case during move-
mint of a motorcar.
According to the present invention there is provided in
a system for fixedly mounting a case or the like box-shaped anti-
ale, the improvement comprising: in combination, a case or the
like and a mounting base, engaging means for engaging one surface
of the case to one surface of the mounting base, said engaging
means comprising a plurality of column-shaped projections with an
annular groove formed thereon respectively, said projections pro-
voided on either one of the one surface of the case or the one
surface of the mounting base, and a plurality of holes formed on
the other one of the one surface of the mounting base or the one
surface of the case at the position located opposite to the pro-
sections, said holes being formed with a first portion of larger
diameter and a second portion of smaller diameter, the periphery
of the larger diameter portion of said holes receiving the pro-
sections during their insertion into the holes, and displacing
means for displacing the case relative to the mounting base after
the former is placed on the one surface of the latter so that the
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projections are moved into the smaller diameter portions of the
openings and are firmly engaged by the latter said displacing
means comprising a tongue standing from the mounting base and a
locking means at the one surface of the case cooperating with
said tongue. Suitably, the annular groove has a V-shaped
sectional configuration having a cross-sectional area increasing
toward the outer surface of the projections and having a bottom
having a width which is less than the wall thickness of the
mounting base. Preferably, each of the holes includes a larger
diameter portion of which diameter is larger than that of the
projections at the lower end thereof and smaller diameter portion
formed by cutting a part of the larger diameter portion with a
circle having the diameter smaller than that of -the larger
diameter portion. Desirably, at least one hole on said mounting
base includes an inclined portion adjacent to a smaller diameter
portion. Suitably, the case includes a combination of an upper
cover and a lower cover both connected to one another by a
plurality of fastening bolts having heads constituting said
column-shaped projections.
Thus, according to the present invention an improved
system for fixedly mounting a case or the like box-shaped article
onto the body of a vehicle such as a motorcar, wherein
- pa -
I
the improvement comprises engaging means for engaging
the one surface of the case to the one surface of a
mounting base and displacing means for displacing the
case relative to the mounting base after the former is
placed on the one surface of the latter so that the
former is firmly engaged to the latter.
In an embodiment of the invention the engaging
means comprises a plurality of projections with a V-
shaped annular groove formed thereon respectively, each
lo of the projections being projected downwardly of the
case, and a plurality of holes formed on the mounting
base at the position located opposite to the projections
whereby the periphery of the holes is firmly wedged
between the upper and lower inclined parts of the V-
shaped annular groove on the projections after the latter are inserted into the holes
The displacing means comprises a displacing
device including a tongue standing upright on the
mounting base and a male threaded screw disposed on
I the case at the position located opposite to a female
threaded hole at the central part of the tongue to be
thread ably engaged to the latter.
After the projections on the case are inserted
into the holes on the mounting base, the displacing
device is operated to displace the case relative to
the mounting base until the periphery of the holes
is firmly engaged to the V-shaped annular groove on
I
the projections. Thus, the case is immovably mounted on the
mounting base.
According to the invention, firm mounting of the case
on the mounting base is achieved by way of the steps of inserting
the projections on the case or the mounting base into the holes
on the mounting base or the case and then displacing the case
relative to the mounting base with the aid of the displacing
device until the periphery of the holes is engaged to the annular
groove on the projections. Therefore, a space required for
mounting operation can be minimized. Other advantageous feature
of the invention is that dimensional error inherent to each of
articles can be absorbed owing to the arrangement that firm
mounting is achieved by engaging the periphery of the holes to
the annular groove on the projections. Another advantageous lea-
lure of the invention is that there occurs no idle movement of
the case on the mounting base in any direction after firm mount-
in of the case is achieved.
In one aspect thereof the present invention thus pro-
vises in a system for fixedly mounting a case or the like
box shaped article, the improvement comprising: in combination a
case or the like and a mounting base, engaging means for engaging
one surface of the case to one surface of the mounting base, and
displacing means for displacing the case relative to the mounting
base after the former is placed on the surface of the latter so
that the former is firmly engaged to the latter, said displacing
means including a pressure actuated piece disposed at the force
end of the mounting base and a tongue disposed on the case at a
position located opposite to said pressure actuated piece and
adapted to come into pressure contact with a surface of the pros-
sure actuated piece. Suitably, the pressure actuated piece is
made of resilient material. Desirably, the tongue is operatively
connected to an inner sleeve adapted to be rotated by means of a
key which is actuated from the outside of the displacing means.
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In another aspect thereof the present invention pro-
vises in a system for fixedly mounting a case or the like box-
shaped article, the improvement comprising: in combination, a
case or the like and a mounting base, engaging means for engaging
one surface of the case to one surface of the mounting base, said
engaging means comprising a plurality of column-shaped project
lions with an annular groove formed thereon respectively, said
projections provided on either one of the one surface of the case
or the one surface of the mounting base, and a plurality of holes
formed on the other one of the one surface of the mounting base
or the one surface of the case at the position located opposite
to the projections, said holes being formed with a first portion
of larger diameter and a second portion of smaller diameter, the
periphery of said larger diameter portions holes receiving the
projections after the latter are inserted into the holes, and
displacing means for displacing the case relative to the mounting
base after the fonder is placed on the one surface of the latter
so that the projections are moved into the smaller diameter port
lions of the opening and are firmly engaged by the latter, said
displacing means including a pressure actuated piece disposed at
the fore end of the mounting base and a tongue disposed on the
case at a position located opposite to said pressure actuated
piece and adapted to come into pressure contact with a surface of
the pressure actuated piece.
I
Lowry the preSerlt illVelltiOII will be described
ill a greater detail hereunder with reference to jigs. 3
to 10 which illustrate preferred embodiments thereof.
Description will be first made as to a
system in accordance with the first embodiment of the
illvention with reference to Figs. 3 to 8. As illustrated
in Fig. 3, a case 30 includes an upper cover 31 and a
lower cover 32 both of which are connected to one another
by means of fastening bolts 33 which are inserted
through the lower cover 32 to be thread ably fitted to
the upper cover 31. As will be best seen from Figs. 4
and 5, the fastening bolts 33 are so designed -that
their head 34 is projected downwardly of the lower cover
32 of the case 30. The head 34 of each of the fastening
bolts 33 comprises a smaller diameter portion 35 and a
larger diameter portion 36 and an annular groove 38
having the shopped sectional configuration is provided
between both the smaller and larger diameter portions
35 and 36. It should be noted that the diameter L of
I" miller (Lamar portion 35 is
,,
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determined appreciably smaller than the diameter Q
of a larger diameter portion aye of a hole 41 formed
on a mounting base 40 to be described later and the
diameter M of the larger diameter portion 36 is
determined appreciably larger than the diameter Q of
the same (see Fig. 6). Further, the inner diameter
of the annular groove 38 on the head 34 is determined
appreciably smaller than the diameter m of a smaller
diameter portion 41b of the hole 41 on the mounting
base 40 see Fig. 6) and the width s of the bottom of
the annular groove 38 is determined appreciably smaller
than the wall thickness t of the mounting base 40
(see Fig. 7). As is apparent from Fig. 3, the mounting
base 40 for firmly mounting the case 30 thereon is
designed in the flat box-shaped configuration of
which four side walls are formed by bending a plate
material and four holes 41 are punched on toe surface
of the mounting base 40 at the position located
corresponding to the heads 34 of the fastening bolts
33. Each of the holes 41 comprises a larger diameter
portion aye and a smaller diameter portion 41b which
is formed by cutting a part of the larger diameter
portion aye with a circle having a certain small
diameter, as illustrated in Fig. 6. Thus, engagement
means for both the case 30 and the mounting base 40 is
constituted by a combination of projected parts on
the case 30 and holes 41 on the mounting base 40.
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Among four holes 41 as described above two holes
41 located at the rear part of the mounting base 40 as
seen in jig. 3 have an inclined portion 41c respectively
which is united with the smaller diameter portion
41b at the rear part thereof as seen in Fig. 6. It
should be noted that the smaller diameter portions 41b
are formed at the position located in the same direction
as seen rearwardly relative to the mounting base 40.
The mounting base 40 includes an upright
standing tongue 42 which is fixedly secured thereto at
the fore end part and a female threaded hole aye is
formed at the central part of the tongue 42. Further,
the lower cover 32 of the case 30 includes an upright
standing bracket 43 which is fixedly secured thereto
at the position located opposite to the tongue 42.
A displacing device 45 with a lock fitted thereto is
disposed on the lower cover 32 of the case 30 at the
position located forwardly of the bracket 42 and the
lock is operatively connected to a male threaded
screw 44 adapted to move toward the bracket 43.
Incidentally, displacing means is constituted
by a combination of the tongue 42 standing upright
from the mounting base 40 and the displacing device 45
as constructed in the above-described manner.
us is apparent from Fig. 8, the displacing
device 45 comprises an inner sleeve aye and an outer
sleeve 45b and the screw 44 is connected to the inner
-- 10 --
sleeve aye. To rotate the screw 44 the displacing
device 45 includes a key 46 as illustrated in Fig. 3
which is adapted to be inserted into a key hole 45c.
In Fig. 3 reference numeral 47 designates a recess
formed on the mounting base 40. On the bottom of each
of the recesses 47 is formed a threaded hole 48 which
serves to fixedly secure the mounting base 40 to
the car body at a predetermined position with the
aid of set screws which are not shown in the drawings.
In the above-described embodiment column-
shaped projections are provided by utilizing the
heads 34 of the fastening bolts 33 projected downwardly
of the lower cover 32 of the case 30. However, the
present invention should not be limited to this
embodiment Alternatively, separate column-shaped
projection having the same configuration as that of
the head 34 of the fastening screw 33 may be fitted
to the case 30. Further, in the above-described
embodiment four col~rshaped projections and four
holes 41 are arranged at the position located
opposite to one another. However, the present
invention should not be limited to this number of
projections and holes. What is to be done is that
a plurality of projections on the lower cover 32 of
the case 30 are arranged at the position located
opposite to the same number of holes on the mounting
base 40.
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Next, operation ox the system of the invention
will be described below.
First, the mounting base 40 is fixedly secured
to the car body at the predetermined position. Next,
the heads 34 of the fastening screws 33 are inserted
into the larger diameter portions aye of the holes 41
on the upper surface of the mounting base 40 (as
illustrated by phantom lines in Fig. 7). The male
threaded screw 44 of the displacing device 45 is
then thread ably engaged to the female threaded hole
aye on the tongue 42 by rotating the key 46. As the
latter is rotated further, the case 30 is caused to
move forward relative to the mounting base 40 in the
direction as identified by an arrow mark C in Fig. 3
whereby the heads 34 of the fastening bolts 33 assume
the position as illustrated by real lines in Fig. 7.
Namely, they are displaced to the smaller diameter
portions 41b of the holes 41. Since the wall thickness
t of the mounting base 40 is determined larger than the
width S of the bottom of the annular groove 38 on
the heads 34 of the fastening screws 33, it results
that the heads 34 of the fastening screws 33 are
displaced to the smaller diameter portions 41b while
the inclined parts 37 of the annular grooves 38 are
guided along the periphery of the smaller diameter
portion 41b and when the latter is wedged between the
upper and lower inclined parts 37 of the annular grooves
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SUE
38, the heads 34 are stopped and thereby they are
located immovably. Since among four holes 41 on the
mounting base 40 two holes 41 located at the rear
part of the mounting base 40 have an inclined portion
41c adjacent to the smaller diameter portion 41b
respectively, it is assured that the heads 34 of the
fastening bolts 33 are located exactly with the aid of
the inclined portions 41c of the holes 41 in the
longitudinal direction as well as in the transverse
direction relative to the case 30. Further, since they
are located in such a manner that the periphery of the
smaller diameter portions 41b of the holes 41 is wedged
between the upper and lower inclined parts 37 of the
annular groove 38, it is assured that the case 30 is
fixedly mounted on the mouthing base 40 without
occurrence of idle movement of the former relative to
the latter not only in the longitudinal and transverse
directions but also in the vertical direction.
In the above-described embodiment the displacing
device 45 with a lock incorporated therein of the type
including a female threaded hole aye on the tongue 42
standing upright on the mounting base 40 and a male
threaded screw 44 adapted to be thread ably engaged to
the female threaded hole aye is employed for displacing
the case 30 relative to the mounting base 40. However,
it should of course be understood that the present
invention should not be limited only to this embodiment.
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Alternatively, the present invention may be embodied
as illustrated in Fig. 9. It should be noted that same
or similar parts or components as those in Fig. 3 are
identified by same reference numerals.
Specifically, in the second embodiment of the
invention a displacing device 70 with a lock incorpo-
rated therein of the type including a pressure actuated
piece 50 made of resilient material disposed at the
fore end of the mounting base 40 and a turntable tongue
60 having the stepped configuration (see Fig. 10)
adapted to abut against the front surface aye of the
pressure actuated piece 50 to displace the case 30 in
the direction as identified by an arrow mark D is
employed for the system. It should be noted that the
smaller diameter portions of the holes I on the
mounting base 40 in this embodiment are oriented in the
reverse direction to those in the first embodiment as
illustrated in Fig. 3. As is apparent from Fig. 10,
the displacing device 70 includes an inner sleeve aye
and an outer sleeve 70b and the inner sleeve aye is
fixedly connected to the tongue 60. When the tongue
60 is to be turned, a key 80 as illustrated in Fig. 9
is inserted into a key hole 70c on the inner sleeve
aye. As the key 80 is rotated to turn the tongue 60,
the stepped face aye of the tongue 60 is brought in
pressure contact with the front surface aye of the
pressure actuated piece 50.
- 14 -
Since in the second embodiment the pressure
actuated piece 50 is made of resilient material, it
is assured that any minor dislocating of the heads 34
of the fastening bolts 33 relative to the holes 41,
that is, dimensional error inherent to each of articles
is effectively absorbed by resilient deformation of
the pressure actuated piece 50, after the case is firmly
mounted on the mounting base 40.
It should be added that the case 30 its normally
trusted in the one direction under the effect of
resilient force of the pressure actuated piece 50, after
the case 30 is mounted on the mounting base 40.
Further, instead of providing a projection on
one surface of the case 30 and forming a hole to be
engaged with the projection on the mounting base 40,
it may be so constructed that the projection is
provide don the mounting base 40 while the hole is formed
.. on the surface of the case 30.
While the present invention has been described
above with respect to two proofread embodiments
thereof, it should of course be understood that it
should not be limited only to them but various changes
or modifications may be made in any acceptable manner
without departure from the spirit and scope of the
invention.
